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Explore the Mysterious World of Geodes by Brad L. Cross & June Culp ZeitnerLearn from 2 world renowned gemologists as they share their lifelong passion and knowledge of everything geodes, from their formation and occurrence to the amazing variety and beuty of these popular world-class gemstones.Over 140 full-colour, detailed photos of diverse geode specimens.
Opal Identification & Value by Paul B. Downing PhD - Revised, Expanded & UpdatedA self-proclaimed "opalholic", Paul B Downing PhD has an international reputation as an opal expert having travelled extensively in Australia and throughout the United States cultivating his knowledge.This hard cover book is beautifully presented with hundreds photographs and illustrations.Learn...
